Sandpapering machine



(No Model.) v 2 sheets-sheen 1. -J. LOWRY.

. SANDPAPERING MACHINE.

No. 543,878. Patented Aug. 6,' 1895.

WITNESSES (No Model.) 2 Sheets-Sheet 2.

J. LOWRY. SANDPAPBRING MACHINE.

No. 543,878. I Patented Aug. 6, 1895.

WITNESSES F 127, [mom/TM:

UNITED STATES PATENT OFFICE.

JOHN LOWRY, OF TECUMSEH, MICHIGAN, ASSIGNOR OF ONE-HALF TO SAMUEL MCCLURE, OF SAME PLACE.

SANDPAPERlNG-MACHINE.

SPECIFICATION forming part of LettersP atent No. 543,878, dated August 6, 1895.

Application fil d July 25, 1894- Serial No. 518,511. (No model.)

To all whom it may concern:

Be it known that'I, JOHN LOWRY,a citizen of the United States, residing at Tecumseh, county of Lenawee, State of Michigan, have invented a certain new and useful Improvement in a Sandpaperi-ng-Machine; and I declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention has for its object a sandpapering-machine for sandpapering door-panels,

the purpose of my invention being to produce a machine whereby the raised face of the panel, together with the beveled faces and rabbeted surfaces, may all be sandpapered on one side of the panel in one operation.

My invention consists of the construction, combination, and arrangement of devices hereinafter described and claimed, and illustrated in the accompanying drawings, in which- Figure 1 is a side elevation embodying my invention, showing apart in section. Fig. 2 is a plan of the same. Fig. 3 is a detail view in horizontal section on the line 3 3, Fig. 1, showing the mechanism for laterally adj usting the cutter-head. 'Fig. 4 is a vertical section through the drum. Fig. 5 is a vertical section through the horizontally -rotatable heads, showing parts in elevation. Fig. dis a detail view, partly in vertical section and partly in elevation, showing the mechanism for adjusting the drum.

I carry out my invention as follows:

A represents any suitable supporting-frame.

B denotes a driving-shaft provided with ordinary fast and loose pulleys b b. The shaft is journaled in suitable boxes A and'A engaged upon the frame. As shown, the driving-shaft is provided with two driving-pulleys B and B 0 is a drum mounted upon a shaft C,suitably journaled in the frame A. This drum may be vertically adjusted in any suitable manner. Idesign to provide the drum either with a sandpaper surface or with a sand belt, as may be desired, a sand belt being shown in dotted lines, Fig. l, at F, thebelt being carried from the drum 0 over an additional drum 0*. If, however, it be preferred to dispense with the sand beltand to provide the surface of the drum with sandpaperor analogous material, the paper may be fastened thereupon in any suitable manner, but preferably as hereinafter explained. The shaft of the drum is provided with a-pulley O belted with the pulley B upon the driving-shaft.

G denotes a vertical rotatable shaft journaled at one end of the frame, as shown, said shaft bearing toward its upper end sandpapering-heads G and-G spaced the one from the other, said heads being so constructed and arranged as to sandpaper the beveled and rabbeted surfaces of the panel. The shaft G is made vertically adjustable in any suitable manner, as by means of an adjusting-screw G Upon the shaft G is a driving-pulley G belted with the pulley B upon the drivingshaft.

, H is an additional rotatable shaft suitably journaled upon the frame, carrying a cutterhead H at its upper end. This shaft is made vertically adjustable in any suitable manner, as by means of an adj usting-screw H Upon the shaft H is a pulley H over which is passed the belt B by which the pulleys G and B are belted together. It will be observed by reference to Fig. 2 that on account of the location of the shaft H of the cutter-head H the shaft G of the sandpaper heads G G is at one side of the driving-pulley B. The belt 13 is accordingly diverted, so as to pass properly about the pulley G, the belt being diverted about the pulley H of the shaft H, the diversion of the belt serving at the same time to rotate the pulley H In order that the drum 0 may be readilyaccessible I prefer to provide the top of the frame A with a table A hinged to the frame, as shown at a, and which may be turned over out of the way when desired, said table being turned out of the way, as illustrated in Fig. 2.

C denotes a sandpaper or other suitable covering for the drum 0, which I prefer to engage upon the drum in the following manner:

O and 0 denote blocks engaged in the rim V lower end of the shaft H may rest in a sup- If) f of the drum, between which are engaged clamping-arms E and E, having a wedged engagement between said blocks.

E denotes a turnbuckle, by which the clamping-arms E E may be tightened. The covering C has its meeting edges turned in between said clam ping-arms and engaged thereby in such a way that when the clamping-arms are tightened up the edges of the covering will be clamped firmly therebetween, and at the same time the covering will be stretched snugly and firmly upon the drum. The turnbuckle may be connected with the clamping-arms in any suitable manner, as by means of a rod E, which may have the turnbuckle interposed therein, one end thereof being engaged about the shaft 0.

I do not limit myself to any definite construction of the cutter-head II. The purpose of the cutter-head is to cut away the corners of the panel slightly to facilitate the entrance of the rabbeted edges into place in making up the door. The cntterhead is preferably of oblong form, as shown more particularly in Fig. 2.

To adjust the cutter-head vertically the port h, the adj Listing-screw H being engaged in the base of said support to bear upon the lower end of the shaft II.

To adjust the cutter-head laterally the support It may be provided with an arm h extended through the side of the frame of the machine, its extremity being provided with an adjusting-screw 71 An additional arm h projects through a slot a in the frame, the elongated slot allowing a lateral movement of the arm h A nut 7L4 enables the arm its to be tightened rigidly in any given position of lateral adjustment.

The drum C may be vertically adjusted in the following manner: J denotes a hanger or bracket engaged upon the frame A, through which is projected an ad justin gscrew K, having a screw-threaded connection in the hanger, as shown at 3'. The upper endof the adjusting-screw K is provided with arms 7n and 7c, projecting upward adjacent to the boxing L of the shaft 0, which boxing may be provided with laterally-projected hubs l. The boxing L is carried upon adjustingscrews M and M passed through the upper ends of the arms 70. By means of the screws M and M" the shaft C may be adjusted laterally, while by means of the screw-threaded engagement of the screw K in the hanger, as atj, the shaft 0 may be adjusted vertically, as may be re quired.

The shaft G may be adjusted vertically by engaging its lower end in a support 9 provided with an. adjustingscrew G having a screw-threaded connection therewith, a spring g being preferably interposed between the adjacent ends of the shaft G and screw G. .The sandpaper heads G G may be constructed in any suitable manner, but prefer- 7 ably each with a rim g beveled upon its periphery, the head G being beveled on its lower face and the head G being beveled on its upper face, as shown at g and 9. Each of the heads is preferably formed with a metallic head G having a screw-threaded connection within the corresponding rim P denotes a conical-shaped block having a dovetailed engagement within the rim (1*. Over the block P is engaged the sandpaper or other analogous covering 1). By tightening the head G against the corresponding block the covering 19 is held tightly over the block.

The operation of my device is as follows: The drum 0 polishes the raised face of the panel. \Vhen the panel is run through the machine on one side, the corresponding raised face is brought into contact with the drum (J. At the same time the upper and under rabbetcd faces and beveled faces on two edges of the panel are simultaneously polished be tween the heads G G the rabbeted faces projecting between the horizontal faces of the blocks P P, while the beveled faces of the blocks P P polish the beveled faces of the panel. We thus have one raised face on the upper and lower rabbeted faces and upper and lower beveled faces at two edges of the panel all polished in one operation. .The panel is then turned over and at right angles to its former position and again run through the machine, by which second operation the raised face on the opposite side of the panel and the rabbeted and beveled faces on the other two edges of the panel on the upper completing the operation.

It will be seen that the device is simple in its construction and operation, while at the same time of superior efficiency.

I prefer that the shaft G should have a slight connection with the heads G and G the shaft having a yielding vertical movement therethrough by means of the spring g, so that the heads G G may give, as occasion may require, for panels of unequal width at their rabbeted edges or for any inequalities on the rabbeted surfaces of the panels.

I prefer that the drum 0 and the blocks (1 C should have an outer covering N of carpeting or an alogous material.

Figs. 1 and 2 show a hanger J at one end of the shaft C. The opposite end of the shaft is supported in a similar manner.

sandpapering heads G and G adjustable upon the shaft G, the one being adjustable independent of the other. This I accomplish by providing the head G with a cap G havin g a screw-threaded connection with the head G said cap being held upon the shaft G by means of a nut g". It will be evident that by adjusting the screw-threaded connection of the cap G with the metallic head G the head G as a whole will be adj usted upward or downward, as may be required. The metallic and lower sides are simultaneously polished,

My invention contemplates having the two 4 head G5 in the head G2 may be formed with a hub G through which the shaft is sleeved, a set-screw g permitting the adjustment of the head G on the shaft.

What I claim as my invention is 1. The sandpapering drum 0 herein described, provided with the blocks 0 C engaged in the rim of the drum, clamping arms E, E having a wedged engagement between said blocks and means for tightening said clamping arms, substantially as set forth.

2. The sandpapering drum 0 provided with the blocks 0 G engaged in the rim of the drum, clamping arms E, E, means for tightening said clamping arms having a wedged JOHN LOWRY. Witnesses:

N. 'S. WRIGHT, O. B. BAENZIGER. 

